Their contact number is 01223300085. It does not look like there is an entrance fee but I would call just to be sure.
Thanks! I also need a 4-star place to stay that has free parking.
attraction-name attraction-type hotel-parking hotel-stars
attraction-name attraction-type hotel-parking hotel-stars
attraction-name attraction-type hotel-parking hotel-stars
attraction-name attraction-type hotel-parking hotel-stars